In-situ surface analysis of AuPd(110) under elevated pressure of CO - Archive ouverte HAL
Article Dans Une Revue Catalysis Today Année : 2016

In-situ surface analysis of AuPd(110) under elevated pressure of CO

Résumé

With the combination of various in-situ surface science tools, surface chemical and structural properties of bimetallic AuPd(1 1 0) alloys are characterized under elevated CO pressure. Under 1 Torr of CO gas pressure, STM images show the formation of nano-sized surface rice-grains along the index direction of [1-10] while PM-IRRAS shows new CO vibrational band. This new vibrational band of PM-IRRAS is confirmed as the CO molecules attached to atop site of Pd with the results of ambient pressure XPS. In the case of adsorption of CO on AuPd(1 1 0) alloys, the so-called "pressure gap" exists and the surface morphology and its chemical states change at elevated pressure conditions. (C) 2015 Elsevier B.V. All rights reserved.
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Dates et versions

hal-01281400 , version 1 (02-03-2016)

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M. A. Languille, E. Ehret, H. C. Lee, C. K. Jeong, R. Toyoshima, et al.. In-situ surface analysis of AuPd(110) under elevated pressure of CO. Catalysis Today, 2016, 260, pp.39-45. ⟨10.1016/j.cattod.2015.05.029⟩. ⟨hal-01281400⟩
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